Seed progeny studies in alliums 2. male meiosis in the progeny plants of tetra ploid allium tuberosum
Gohil, R.N.; Koul, A.K.
Cytologia 48(1): 109-118
ISSN/ISBN: 0011-4545 Accession: 006378679
Male meiosis was studied in seed progeny of autotetraploid desynaptic A. tuberosum. Of the 50 plants scored 4 were aneuploids, 2 each with 31 and 33 chromosomes. There was variation in the pairing behavior of the chromosomes. The frequency of desynaptic cells was considerably increased. The male sporogenous tissue of the progeny plants was chimeric with cells having zygoid and double the zygoid number of chromosomes. Meiosis in the pollen mother cells with zygoid number of chromosomes was abnormal and characterized by the presence of multivalents, bivalents and univalents at metaphase I; in addition there were unequal distribution of chromosomes, presence of chromatin bridge/s, fragments and laggards at anaphase. Male meiosis in the cells with double the zygoid number was normal with bivalents only and equal separation of chromosomes at anaphase.